Movable threshold



(No Model.)

B. SCHMIDT.

MOVABLE THRESHOLD.

No. 348,349. Patented Aug. 31, 1886.

WITNESSES:

INVBNTOR ATTORNEYS.

UNITED STATES PATENT OFFICE,

EUGENE SCHMIDT, OF STILIAVATER, MINNESOTA.

MOVABLE THRESHOLD.

SPECIFICATION forming part of Letters Patent No. 348,349, dated August31, 1886.

Application filed May 22, 1886. Serial No. 202,942.

.7?) aZZ whom it may concern.-

Be it known that I, EUGENE SCHMIDT, of Stillwater, in the county ofVashington and State of Minnesota, have invented a new and- ImprovedMovable Threshold, of which the following is a full, clear, and exactdescription.

My invention relates to the construction of a threshold arranged to becarried by and applicable for use in connection with any door, theobject of the invention being to do away with the permanently-menntedthresholds in common use, thereby leaving the floor level beneath thelower edge of the door.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar figures of reference indicatecorresponding parts in all the figures.

Figure 1 is a side view of the lower portion of a door provided with myimproved form of movable threshold,certain portions of the door beingbroken away in order to disclose the construction of the parts. Fig. 21sa sectional plan view taken on the line 00 0c of Fig. 1, and Fig. 8 is avertical sectional view taken on line 3 g of Fig. 1.

In arranging such a threshold as the one forming the subject-matter ofthis application, I form a recess, 2, in the rear edge ot'the door 10,and to the rear edge of the door I secure a plate, 3, that is formedwith two inwardlyprojecting lugs, 4 and 5, each lug being formed with acentral aperture to receive the shank of an angle-iron, (S. Along thebottom edge of the door there is a groove, 7, arranged to receive thevertical flange 8 of an inverted- T iron, 9, that is rigidly secured tothe horizontal arm 11 of the angle-iron 6, connection between the partsbeing established by means of a bolt or screw, 12. Upon the forward endof the T- iron 9 there is arranged a vertical post or standard, 13,which enters a socket, 14, arranged as best shown in Fig. 1. To theunder side of the iron 9 I secure a strip, 15, which constitutes thethreshold of the door, the space between the lower edge of the door andthe upper face of the threshold 15 being covered by molded metallicstrips 16, that are (No model.)

secured to each face of the door, as clearly shown in Figs. 1 and 3.

Directly beneath the angle-iron (ithere is arranged a roller, 17, whichrides upon a camplate, 18, that is countersunk in the floor.

Although not absolutely necessary,I greatly prefer to provide a spring,19, which will act to force the threshold 15 to the position in which itis shown in Fig. 1, said spring being coiled about the vertical shank ofthe angleiron 6, arranged to abut against the under side of the lug orprojection 5 and bear upon apin or stop, 20, that is carried by thevertical shank of the angle-iron 6.

Such being the general construction and arrangement of my improved formof threshold, it will be seen that as the door is swung open the roller17 will ride up the inclined face of the cam 18, and will thus slightlyraise or elevate the threshold 15,so that it will swing clear of thefloor.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. As a new article of manufacture,a threshold designed for attachmentto the door, consisting of a plate provided with guiding-lugs, anangle-iron, the shank of which is fitted within said lugs, a T-irou towhich the threshold proper is secured that is united to the horizontalarm of the angle-iron named, a roller being mounted upon the under sideof the T- iron, and a cam-plate, all parts being designed forarrangement substantially in the manner described.

2. The combinatiomwith a door, of a plate, 3, formed with lugs 4 and 5,an angle-iron, 6, the shank of which is mounted in apertures formed insaid lugs, a threshold connected to the horizontal arm of saidangle-iron, a roller, 17, and a cam plate, 18, substantially asdescribed.

3. The combination, with a door, of the followiugelements: a plate, 3,provided with apertured lugs, an angle-iron, 6, to which there issecured a T-iron, 9, said angle iron being mounted so that its shankrests within the apertures of the lugs formed upon the plate 3, aroller, 17, carried by the angle-iron 9, a

cam-plate, a threshold, 15, secured to the angle-iron 9, and shields 16,substantially as described.

4. The combination, with a door, of an inverted-T iron, 9, provided witha standard, 13, that is arranged to enter a recess formed in the door,an angle-iron, 6, to which the T-

